import tkinter as tk
window = tk.Tk()
window.title('my window')
window.geometry('400x400')

l = tk.Label(window,bg = 'yellow',width =20,text='empty')
l.pack()
def print_selection():
    if(var1.get()==1)&(var2.get()==0):
        l.config(text='I love python')
    elif(var1.get()==0)&(var2.get()==1):
        l.config(text='I love C++')
    elif(var1.get()==0)&(var2.get()==0):
        l.config(text='I do not love either')
    else:
        l.config(text='I love both')

var1 = tk.IntVar()#变成整数Var
var2 = tk.IntVar()
c1 = tk.Checkbutton(window,text='Python',variable=var1,onvalue=1,offvalue=0,command=print_selection)
#选上代表1，没选上为0
c2 = tk.Checkbutton(window,text='C++',variable=var2,onvalue=1,offvalue=0,command=print_selection)
c1.pack()
c2.pack()
window.mainloop()
